Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59dc998d17bf074…

MALICIOUS

PDF

40.0 KB Created: 2020-08-10 01:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f7bfb90c41f22890619e6329b704625 SHA-1: 771664a8cee17ba5b6bace4179d3a121fdb130f7 SHA-256: a59dc998d17bf074f1f6a01b5991c4b1bc22bc40ab025985ef92a898091a73da
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though partially corrupted, appears to be a lure related to 'Antrenmanlarla matematik 3 soru çözümleri pdf', suggesting an attempt to trick users into clicking malicious links under the guise of educational material. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=antrenmanlarla+matematik+3+soru+%25C3%25A7%25C3%25B6z%25C3%25BCmleri+pdf
    • http://files.firsteatright.com/uploads/1/3/1/0/131070149/8165327.pdf
    • http://files.customweddingsofcolorado.com/uploads/1/3/1/6/131606228/tajigakelewidipugisa.pdf
    • http://files.iodemargaretstokespetrolia.ca/uploads/1/3/1/3/131380845/rimaxemef.pdf
    • http://zugix.nourishabley.com/uploads/1/3/1/3/131383613/68467.pdf
    • https://cdn.shopify.com/s/files/1/0436/7951/4777/files/valelarilogajuxanonemewam.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/comic_arrugas_paco_roca.pdf
    • https://cdn.shopify.com/s/files/1/0439/9982/1982/files/cctv_system.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/rikivokajerafagol.pdf
    • https://cdn.shopify.com/s/files/1/0437/9554/6273/files/31734995977.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/sodifevogapuzo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/rakalojesikafuzazebejura.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/54692915015.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/tabesiniki.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/tratado_prtico_de_apicultura.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/67270095446.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/37983334715.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/jatufedarutej.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058b0.bin
3456a40044a76d86aa373def17ef3794628e3839fa96e1f898d33c49971e49c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B0 5896 bytes
font_01_sfnt_off00006c34.bin
04576b94ce99ed5fc639cc686d7528766d269fa405a9b68df5bc71a03d007cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 11820 bytes

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